A Brief History Of Two Way Radio Communication - Hytera ...

When you think of two-way radio communications, images of the 'walkie-talkies' you had as a child probably spring to mind. GlobalsitesResourcesNewsAboutContactAddressPartnerportal FindaproductTwo-wayradiosSystemsAccessoriesCasestudiesFindadealerGlobalsitesResourcesNewsAboutContactAddressPartnerportal Terms&conditionsPrivacypolicyCookiepolicy WhereitallbeganRadiocommunicationdatesbacktotheearly20thCenturywhentwo-waytelegraphytrafficwasusedacrosstheAtlanticOcean.Thetechnologywasfirstemployedonships,enablingthoseatseatocommunicatebacktocontactsontheland.By1912bothmilitaryandcommercialshipscarriedtransmittersandreceivers.Someyearslaterin1923,thefirstmobiletwo-wayradiobegantobeusedbyAustralianpolice.Thenewtechnologyallowedofficerstotransmitfromcarsratherthanhavingtorelyonpolicetelephoneboxes.Thefirstsetslookedverydifferenttotoday’stwowayradios,takinguptheentirebackseatofapatrolcar.Justlikemanysimilartechnologies,two-wayradiosstartedtoevolve,becomingmorecompact,morepowerfulandeasiertouse.Thisallowedthemtobeusedformanyotherpurposes,includingonaircrafts.Hand-helddeviceswereusedextensivelybygroundtroopsandtheairforceonbothsidesinWorldWarII.Atthetime,allsignalswereonthesamefrequency,thiswasknownas‘simplexmode”.Therestrictionsofsimplexmodemeantthatonlyonestationcouldtransmitatonetime,whilstotherslistened.Despitethis,simultaneoustransmissionandreceptionwasmadepossiblebyusingreceiversandtransmitterstunedtodifferentfrequencies.Toachievethis,operatorsalsohadtoovercometheinterferenceissuescausedbyplacingthetwodevicessidebyside.Duringthewar,transmissionsweremadeinMorsecode,andlargeteamsweretaskedwithsendinganddecipheringradiocommunication.ModerndaycommunicationToday,two-wayradiocommunicationhascomeonleapsandbounds.Two-wayradiocommunicationsareusedinallaspectsoflife,includingbusiness,themilitaryandpolicing,aswellasinarangeofhomedevicessuchasbabymonitors.BothMobileandstationaryunitsarestillavailable,buttheyareasgoodastheyhaveeverbeen.Hand-helddevicesaredesignedtobejustthat,aperfectsizetoholdanduse,withafargreaterrange.Today’sanaloguetwowayradiostypicallyhave14channels,whilstDMRofferstwovoicepartsperchannel,allowingsimultaneoustransmissionstotakeplace.Digitaltrunkingtechnologytakesthisonestepfurther,allowingradiochannelstobepooledbymultipleusergroups.Thearrivalofdigitalradiohasalsobroughtahostofnewfeaturesincludingbackgroundnoisecancellation.HardwearingdevicesThesedays,Two-wayradiohandsetsaredesignedtobehighlyrobustandfunctioninthemosttestingclimates.Two-wayradiocommunicationisevenbeingusedtohelpdealwiththenaturaldisastersandpublicemergencies.Manymodelsarewateranddustresistant,whilstexplosion-proofhandsetsareusedinmanyhighriskenvironmentssuchasoilrigsandfactories.Thiswouldhavebeenunthinkableintheearlydays,andgivesyouasenseofhowfartheyhavecome.Ifyou’researchingforthebesttwowayradiosforyourbusiness,whynotcontactustospeaktooneofourexperiencedteamtoday?Wecanhelpguideyoutotheidealcommunication’ssolution. BacktoNewsList 28December2016 Communication101:Bestpracticesforefficiencyandsafety Two-wayradiosintheworkplace Selectadevicetype Handheld Ahandsettograbandgo-inthepocket,onyourbelt,alwayswithyou. Mobile Avehicle-mountedordesktopdevice,alwaysavailableandinposition. HandheldATEX Ahandsetspecificallydesignedforuseinexplosiveworkenvironments. Repeaters&Systems Extendcoverageandcapacity,buildyourmodularradionetwork. BodycamRSM Remotevideospeakermicrophoneforevidencecapture Selectaradiotechnology LTE LTEisthelatestcommerciallyavailablewirelessstandard,designedforbroadbanddataservices. DMR Adigitalstandard,idealforcommercialandprofessionalusersacrossindustries,offeringrichfunctionalitywithdigitalclarity. TETRA Adigitalstandard,idealformission-critical,high-securityapplications.Designedwithpublicsafetyinmindtosupportlargevolumesofvoiceanddatatraffic. Analogue Traditionaltechnology,onewaytransmissions,idealforsimplecommercialrequirements. DoyourequireGPS? GPS ClickhereifyouwouldliketoseealldevicesthatofferGPSfunctionality(eitheroptionalorasstandard). Selectafrequency UHF UltraHighFrequenciesrangebetween300MHzand3GHz,idealforprofessional,secure,licensedcommunications. VHF VeryHighFrequenciesrangebetween30MHzand300MHz,idealforprofessional,secure,licensedcommunications. Licence-free Operatingonlicencefree446MHz,deviceshaverestrictedpowerandrange. Any/allfrequencies Choosethisoptiontoviewallproductsregardlessoftheirfrequencyrange. Don'tshowthisguideagain SkipGuide Next